Burner.



Patented Aug. I9, |902. M. s. WALKER.

B U R N E R (Application med oct. 7, 1901.)

(No Model.)

vZO

IINrri-o Srarnsv v jPATENT OFFICE.'

MILO S.- WALKER, OF CHICAGO, ILLINOIS, ASSIGNOR OF TWO-THIRDS TO MAXHERSKOVITZ AND ABRAHAM L. HERSKOVITZ, OF CHICAGO,

ILLINOIS.

BURNER.

SPECIFICATION forming part of Letters Patent No. 707,286, dated August19, 1902.

Application filed October 7, 1901 Serial No. 77,829. (No model.)

To all whom, it may concern.-

Be it known that I, MILo S. WALKER, a citizen of the United States ofAmerica, residing at Chicago, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements in Burners,ofv which the following is a specification.

My invention relates to improvements in burners of the so-called 'Bunsenor colorless-dame type,the object of which is to effect a more perfectcombination of air and gas for the purpose of increasing the heatingcapacity whereby under a given gas-pressure a larger mantle can beheated to complete incandescence than with the use of the ordinary Bun-`sen burner. i y

In general my improvement consists in an apparatus whereb)7 gas from asuitable supply is delivered under pressure through a small orifice ornozzle, thereby forming a swiftly-moving jet, said jet drawing with it acertain quantity of air, the mixture thus` formed passing through anelongated passage on its way to the point of combustion of the` Thismixture of gas and air, howburner. ever,before entering the passage-wayreferred to passes bya series of hooded openings,where it receives afurther supply of air, thereby furnishing said jet with a perfectmixture of gas and air before reaching the point of combustion. Theapparatus by which this arrangement is attained is shown in a drawingaccompanying this specification by means of a central longitudinalsection of a burner constructed on the plan of the preferred form andarrangement.

In the drawing, A represents a tubular casing, the bottom of which isclosed by a perforated plug a, in rwhich is threaded a nozzle B, havingupon its lower end an internallyscrew-threaded nipple b for attachmentto a gas fixture. The upper end of the nozzle contains a small orificeb', through which the gas is forced in a small and swiftly-moving jet.Above the plug a and preferably below the end of the nozzle are openingsa in the tube A for the admission of air into the mixing-chamber A ofthe burner. The size of the openings et may be regulated bya sleeve C,having openings c, adapted to register with the openings a in the tubeor to be moved thereupon to reduce the size thereof, l

so as to regulate the quantity of air drawn in at this point.

Above the nozzle B is a second set of openings a2 in the tube A, whichopenings are shielded by a hood a3 to prevent a current of air frompassing directly across the mixingchamber, and thereby interfering withthe perfect operation of the burner. Said hood Vdoes not, however,prevent the free access of air to the mixing-chamber at this point, as

.the annular space between it and the tube is quiteV sufficient to allowthe required quantity of air to enter.

Above the hooded perforations a2 is secured a diaphragm D,having anaperture in line with the nozzle, and in said aperture is secured a tubeE,extending up beyond thediaphragm for quite a distance to form anelongated passage-way through which the thoroughlymixed gas and air mustpass to the point of combustion. It will thus be understood that whengas is delivered to this burner, it must passthrough the nozzle, and uptherefrom in 'the form of a jet moving at considerable speed, that thejet thus formed will draw in air through the openings ct' and deliverit, together'with the gas,through the tube E into the chamber A2. Thatthis jet of gas and air mixture,acting upon the principle of an injectorwill draw in with it a further supply of air through the openings a2before entering the tube E, and thereby receive a sufficient quantity ofair which becomes thoroughly mixed with the gas, and when delivered tothe chamber A2 produces a iiame of intense heat, which when applied to amantle heats the same to perfect incandescence. In this manner a largermantle can be used in connection withthe burner, which because of theperfect combustion attained, and consequently the intense heatproduced,enables the same to heat a large mantle to perfectincandescence.'v In burners of the ordinary kind,although using moregas, they are unable to get a perfect mixture of gas and air, andconsequently the required amount of heat.

A series of openings a2 above the top of the nozzle furnish a constantsupply of air, pro- Ico tected as they are by the hood a, and at thesame time the additional or supplemental openings ct furnish a means ofnice adjust'- ment, through which complete combustion may be attainedand any variation in the pressure of gas compensated for. Thecombination of the two sets of openings gives greater delicacy ofadjustment, inasmuch as the lower and adjustable set may be usedentirely for the purpose of varying the supply of air, while the upperset furnish the minimum supply and are never interfered with by theadjustment of the lower set. To attain the result produced by thisburner, both sets of openings should be in the mixingchamber, in whichthe gas mingles with the air prior to its passage through the tube Einto the chamber A2, and it is greatly preferable that the constantopenings be above the end of the nozzle and be hooded or otherwiseshielded and the adjustable openings be below the top of the nozzle andbe provided with means for varying their size to suit the requirements.

I claim as new and desire to secure by Letters Patentl. In a gas-burner,the combination with suitable Walls inclosing a mixing-chamber, of agas-nozzle entering said chamber, the lateral walls of said chamberbeing independently perforated above and below the end of said nozzleand the top wall thereof being perforated in line with said nozzle, anda suitable extension inclosing a chamber beyond the perforation in saidtop wall; substantially as described.

2. In a gas-burner, the combination with an inlet-nozzle, of an inclosedmixingchamber which said nozzle enters, provided with a lower series ofopenings below the end of the nozzle and having means for adjustment andan upper series of openings above the end of the nozzle, a hood arrangedabout the upper series of openings, a chamber above the mix ing-chamberand a diaphragm between the two having a connecting-opening in line withJthe nozzle; substantially as described.

3. In a gas-burner, the combination with a tubular chamber having twosets of perforations, the upper set of which is inclosed by a suitablehood, of a nozzle opening between said two sets of perforations, adiaphragm in said chamber above the perforations and a reduced tubesecured in said diaphragm and in alinement with the nozzle;substantially as described.

4. In a gas-burner, the combination with the tubular casing, A, havingperforations, a', d2, at dierent points in its length, of a nozzle, b,opening between said perforations, a hood, a3, inclosing the uppermostof said perforations,a diaphragm,D,extending across the tubular casing,A, and a tubular passage, E, connected to said diaphragm; substantiallyas described.

In witness whereof I have hereunto set my hand, at Chicago, in thecounty of Cook and State of Illinois, this 1st day of October, A. I).1901.

MIL() S. VALKER.

Witnesses:

CHAS. O. SHERVEY, S. Buss.

